DDust rolls out of tight loops?
I'm afraid to go any further back, it's at about 11.5% of the MAC. Rolling out of a loop is usually a sign of a tail heavy plane, but this can't be tail heavy, Right? Will moving the CG back, somehow help a delta? Loops and turns are wide, but more throw, causes it to roll out. Deadstick, it runs out of elevator.
Whatcha think?